酸碱环境下纤维水泥土力学特性研究  

Mechanical Properties of Fiber Cement Soil in Acid-Base Environment

作　　者：师莹琨 刘锋 陈四利 张晨曦 王艳文 SHI Yingkun;LIU Feng;CHEN Sili;ZHANG Chenxi;WANG Yanwen(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;Jining Government Investment Project Construction Management Center,Jining 272000,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,沈阳110870 [2]济宁市政府投资工程建设管理中心,济宁272000

出　　处：《硅酸盐通报》2020年第10期3298-3303,3320,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51279109,51608332)。

摘　　要：为了研究掺入废弃玻璃纤维的水泥土在不同pH值养护环境中的力学性能,制备了不同掺量的废弃玻璃纤维水泥土和作为对照组的玄武岩纤维水泥土与素水泥土试件,并分别置于酸性环境和碱性环境溶液中养护7 d、28 d、45 d,分别进行了水泥土抗压强度和抗折强度实验。分析了养护龄期、养护环境对不同种类纤维水泥土抗压强度的影响,分析了废弃玻璃纤维掺量对水泥土脆性指数的影响,探讨了不同纤维水泥土在酸碱环境下的作用机理。实验结果表明:酸性环境(pH=5)导致纤维水泥土的抗压强度降低;在水泥土中掺入适量的废弃玻璃纤维,可以降低脆性;使用废弃玻璃纤维掺入水泥土,其抵抗酸性环境腐蚀的能力更好;玄武岩纤维对水泥土抗压强度的提升和力学性能的改善效果更好。To study the mechanical properties of cement soil mixed with waste glass fiber in different pH environment,waste glass fiber cement soil with different content,basalt fiber cement soil specimen and basic cement soil specimen were prepared.They were put in acid-base environment curing for 7 d,28 d and 45 d,respectively.The compressive strength and flexural strength of them were tested.The effects of curing age and curing environment on the compressive strength of different fiber cement soil were analyzed.The influence of waste glass fiber content on the brittleness index of cement soil was analyzed.The action mechanism of different fiber cement soil in acid-base environment was discussed.The experimental results show that the compressive strength of fiber cement soil decreases under acidic environment(pH=5).Adding proper amount of waste glass fiber to cement soil can reduce its brittleness.The resistance to aicd environment corrosion ability of cement soil is better after adding waste glass fiber.It is better to improve compressive strength and mechanical properties of cement soil after adding basalt fiber.

关 键 词：废弃玻璃纤维 纤维水泥土 抗压强度 抗折强度 酸碱环境 

分 类 号：TU528.58[建筑科学—建筑技术科学]